Don't undertake to live with your mother-in-law, but if worst comes to worst, let your mother-in-law live with you. 千万别想到跟岳母住一起; 可是万一最坏的事情发生的话,就让岳母跟你住一起吧。
Do not undertake to live with your mother- in- law, but if worst come to worst, let your mother- in- law live with you. 千万别想到跟岳母住在一起; 可是,万一最坏的事情发生的话,就让岳母跟你住在一起吧。
Next he undertook to pay off the debts. 然后他同意负责偿还债务。